Waterway Waterway 10in White Ultra-Retro Gunite High Flow Anti-Entrapment VGB Safety Drain Frame & Grate 640-2120V 10" COVER ULTRA-RETRO WHT Open Area: 20.4 sq. in. Floor Flow Rate: 224 GPM Wall Flow Rate: 192 GPM Ultra Suction Outlet is an underwater suction drain cover system intended to replace any drain cover up to 10 inches in diameter. The maximum flow rate for Ultra Suction Outlet is 224 gallons per minute (GPM) Floor and 192 GPM Wall. Ultra Suction Outlet should operate best when used with residential pumps of up to 3 HP. Please ensure your pool or spa pump system meets this specification. Your Ultra Suction Outlet includes five important components. All components #1-4 below must be used for proper installation. These components are as follows: 1. White drain cover support plate 2. Drain cover 3. Three #10 x 7/8" security screws to secure drain cover to drain cover support plate, together with a tool for installing these screws 4. Two #8-32x3/4" flat head Phillips drive screws This product is certified to comply with 1404 of the Virginia Graham Baker (VGB 2008) Pool and Spa Safety Act. A copy of teh test results for the above may be found at www.waterwayplastics.com or go to www.ul.com.